fixup travis segfault handling in test executable

.travis.yml

@@ -40,6 +40,10 @@ script:
     - if [[ "$WML_TESTS" = true ]]; then time ./run_wml_tests -v -t "$WML_TEST_TIME"; fi
 after_failure:
     - if [ -f "errors.log" ]; then echo -e "\n*** \n*\n* Errors reported in wml unit tests, here is errors.log...\n*\n*** \n"; cat errors.log; fi
+    - if [ "$TEST_ERROR_CODE" = 200]; then echo -e "\n***\n*\n* Encountered a segfault in the c++ unit test executable, attempting to get a backtrace in the remaining time...\n*\n***\n"; fi
+    - if [ "$TEST_ERROR_CODE" = 200]; then time sudo apt-get install -qq gdb; fi
+    - if [ "$TEST_ERROR_CODE" = 200]; then time scons build=debug extra_flags_debug="$EXTRA_FLAGS_RELEASE" test; fi
+    - if [ "$TEST_ERROR_CODE" = 200]; then time gdb --eval-command=start --eval-command=continue --eval-command=bt --eval-command=quit --args ./test-debug; fi
 notifications:
     email: false
     irc:

utils/travis/test_wrapper.sh

@@ -3,9 +3,10 @@ COUNTER=10
 ./test
 ERRORCODE=$?
 while [ $COUNTER -gt 0 -a $ERRORCODE -eq 200 ]; do
-    echo "test apparently timed out with error code 200... trying again."
+    echo "test gave error code 200 (segfault).. trying again."
     COUNTER=$((COUNTER-1))
     ./test
     ERRORCODE=$?
 done
+export TEST_ERROR_CODE=$ERRORCODE
 exit $ERRORCODE